Feed wheel and casing



NOV 10. l942- B. HoLTzMANN FEED WHEEL AND CASING Filed Deo. '2, 1938IIlllllzllll/ Patented Nov. 10, 1942 -UNITED STATES rAT'gENT OFFICE/.

Y segreti...

Bernhard Holtzmann, Herne, Germany; vested in the Alien PropertyCustodian Application December 2, 193s, serial No. 243,677

In, Germany August 26, 1938 Y 1 Claim. (cl. azi- 136) In blower refusemachines it isrknown to make the pocket wheel conical and' axiallyadjustable. By this' means .the end ywalls of the pocket'wheel canalwaysbe circular and caused to bear tightly against the casing wall tocompensate the wear occurring in service. t

To effect the adjustment of the pocket wheel a screw thread is providedon one end of the shaft projecting from a bearing in the rigid casingand by screwing and fixing nuts thereon. By tightening the nuts againstthe bearing, the shaft and therefore the pocket wheel can be adjusted inthe casing. This make-shift construction, however, requires that theshaft is axially shiftable in its bearings and can also be adjusted onlyY when the machine is at a standstill.v

the pocket wheel shaft in a neck-journal bearing in such a manner thatthe adjustment of the' pocket can only be effected by axial displacementof the bearing. For this purpose the bearing is arranged on a bracketxed on the machine casy ing and equipped with laterally projecting ribs,on both sides of which pressure screws, arranged laterally below thepocket wheel shaft, act eccentrically to the axis of the bearing. Thepressure screws are rotatable in cams on the bracket, which cams act aslocking nuts. Altogether at least four screws are required for xing thebearing.

This method of adjusting the pocket wheel takes a relatively long timebecause each of the pressure screw nuts must be adjusted for making eachadjustment and is inconvenient because the nuts must all be tightened asfar as possible at the same time.

However, it has alsobeen suggested for readjusting the pocket wheel, tot a collar on the pocket wheel shaft on the outside of the transversebearing, to x on the housing a tubular, screw threaded extensionsurrounding the collar and to screw on this extension an internallyscrew thread sleeve whose end face bears against the collar. By turningthis screw sleevevthe end face thereof is connected with the collar onthe shaft so that the pocket wheel can be adjusted. This construction ofthe adjusting device is, however, based on an entirely dierent principlein which the bearing is rigidly xed in the casing cover so that theshaft must be axially shifted in the bearing during the re-adjustment.The result of this is that during the re-adjustment unfavourable orunequal stresses occur in the bearing owing to the pulling of the unwornpor- ,tion of the shaft into the bearing.

The invention relates to devices of this type in Which the re-adjustingofthe pocket wheel by axial displacement of'a. bearing` carrying thepocket wheel, which bearing'is secured against rotation in rigid guidesin the casing, is elected by adjusting means provided with screw threadsand engaging eccentrically to the centre of the bearing. The doubts atfirst raised against such adjusting means, that the bearing would skewowing to the eccentric engagement of the adjusting means, have beenfound to be unwarranted as, if the bearing has good axial guiding, itcannot skew. By the invention the construction of such a bearing and atthe same time the displacement thereof for the purpose of Ire-adjustingthe pocket wheel, is considerably simplified and improved in that thebearing element has a screw threaded bore extending parallel to theaxisof the bearing, in which bore a rotatable screw spindle securedagainst displacement in the rigid casing is arranged and guided. Whenthe screw spindle is rotated, the bearing rides on this spindle and isreliably guided in its rigid guides so that it cannot skew. The guidesfor.l the bearing element secured against rotation have flat surfacesand are easily exchangeable. The screw threaded bore in the bearingelement for receiving the screw spindle and the spindle itself may be ofrelatively small dimensions and simple construction s o that theassemblage of the bearing is scarcely altered thereby and consequentlythe bearing with the adjusting device can be produced simply andcheaply. The arrangement of a screw spindle in a screw threaded bore ofthe bearing mounted in the casing and unshiftable, presents theadditional advantage, that all movements of the bearing, that is allmovements which are not caused by the turning of the spindle, areprevented, seeing that the spindle itself forms an additional guidearranged in spaced relationship to the casing guide. and thus alsoopposes a skewing of the bearing.

The invention can be embodied in several con structions, the mounting ofthe spindle being dependent upon the type and the arrangement of thebearing in the machine casing. When the shiftable bearing is arranged ina groove of a bracket fixed on the casing cover, the bearing elementaccording to the invention is provided with an arm having a screwthreaded bore, which arm extends through a guide slot in the bracket andcooperates with a screw spindle which is unshiftably mounted in thebracket. A good and simple form of construction is also attained whenthe bearing is arranged shiftable and locked against rotation in asleeve fixed on the casing cover, and when the bearing element has ascrew threaded bore extending parallel to the bearing axis, and aspindle rotatably mounted and secured against rotation in the cover ofthe sleeve operating in this bore.

The spindle may be rotated by displacing the bearing by means of a handwheel iixed on the end of the spindle. The spindle may also have someother drive, for example it may be coupled with a worm gear, instead ofbeing provided with a hand wheel.

Two embodiments of the invention are illustrated by way of example inthe accompanying` drawing in which- Fig. 1 shows in verticallongitudinal central' section the rst form of constructiom.`

Fig. 2 is an elevation showing the left end` the machine illustrated inFig. l,

Fig. 3 is a vertical longitudinal central section through a second formkof construction.

According.. to Figs. 1 and 2. a conical pocket..

wheel '2 is rotatably mounted in acasing I of 'a blowerrefusermachineand itsshaft y3.-rests in bearings 4, 5; The casing I isclosedv at its. ends by covers 6 `and 1; The bearingdis constructed as aneck journal bearingand. surrounds at one enda collar 8 for the likeion: the shaft l3 of the pocket Wheel'Z.

The bearing 4 is .carried by .a `bracket, Sidetachably fixed .on thevcover` 6 for example bybearing can be shifted backwards or forwards. Asthe bearing is constructed as a neck journal bearing the pocket Wheel 2will also participate in any displacement which can take place, evenwhen the blower refuse machine is in operation. The device according toFig. 3 also comprises a casing I with conical pocket wheel 2' and shaft3' which rests at one end in a collar thrust bearing I6. The collarthrust bearing is slidably mounted in a sleeve II on the casing cover I8and secured against rotation by a key I9. Above the pocket wheel shaft3' the bearing I6 has a screw Athreaded bore 20 in which a screw spindle2l secured against displacement and journalled in the coverof the sleeveI'I rotates. For effecting the drive the spindle 2I has a worm wheel 22meshing with a worm 23 which can be rotated by hand for example with theaid of a crank.

The-shaft 3 is coupled with the bearing I6 in such manner that itparticipates in the axial movements of ,thebearing Inthisiorm ofconstruction ,thef-pocket wheel can also :be .shifted while the blowerrefuse machine is running;

I claim:-

A device comprising in combination a casing, rigid guides on said casingarranged in' spaced relation to provide aguideslot therebetween, abearing-4 axially shiftable.` and secured against rotation in saidguides,'a ishaft ournalled in said bearing.Y and held. against axialdisplacement therein, aconical pocket wheel rigidly4 carried by saidshaft inrsaid casing, a bracket on said casing, an 'arm on lsaid.bearing engagingv said guide slot vand having a screwthreaded bore, anda screw spindle secured against axial displacement in said bracket andengaging in said screw threaded :bore `to axially displace, said bearingwith saidshaft'- and-.said pocket wheel iny both directions. Y

BERNHARD HOLTZMANNl

